| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.501 INCHES NOMINAL |
| FASTENER LENGTH | 1.0635 INCHES NOMINAL |
| MATERIAL | STEEL COMP 4140 OR |
| STEEL COMP 4340 OR |
| STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6382 ASSN STD 1ST MATERIAL RESPONSE OR |
| AMS 6415 ASSN STD 2ND MATERIAL RESPONSE OR |
| AMS 8740 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | FLAT FILLISTER |
| HEAD DIAMETER | 0.597 INCHES MINIMUM AND |
| 0.612 INCHES MAXIMUM |
| HEAD HEIGHT | 0.176 INCHES MINIMUM AND |
| 0.188 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CLUTCH TYPE II |
| GRIP LENGTH | 0.5625 INCHES NOMINAL |
| GRIP DIAMETER | 0.311 INCHES MINIMUM AND |
| 0.312 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS1578 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |